Doesn't work with any of my phones
For USB C Splitter for Android Auto / Apple Carplay
I purchased this to connect a Kenwood Android Auto head unit to my main phone (currently, Pixel 5 but I have a 6A as well). I can *only* get my Pixel 5 or 6A to come up as a USB device in the following circumstances.
- USB data connected *first*
- Power provided via USB-A to USB-C cable, not USB-PD
If I do things in this exact sequence, the USB data channel comes up. If I change the sequence by connecting power first, the USB data connection will not come up. If I try to use USB-PD (in any sequence) the USB data connection will not come up. My Kenwood DMX9720XDS head unit only brings up the USB data connection after it has booted (~10 seconds after it is powered on). Any power provided from a supply comes on immediately when the ignition is turned on, so the sequence won't work. USB-PD can't be used as I cannot get it working at all with USB data via the splitter on these phones.
The Pixel 5 will charge, and will charge at USB-PD rates, but will not make a USB data connection unless the power source is not USB-PD. It will also not bring up its USB data connection unless USB data is connected first or at the exact same time as the USB data connection.
I also tried on an Oppo A76. The Oppo worked reliably but only charged at 500mA even when connected to a USB-PD charger.
I can't recommend this product. I believe this setup needs to be an active circuit which performs negotiation on behalf of the phone and the USB data device (i.e., a head unit).
